CN115613128A - An Intelligent Control System for Crystal Growth - Google Patents

Abstract

The invention discloses an intelligent control system for crystal growth, relates to the technical field of crystal growth, and solves the technical problems that the crystal growth process cannot be accurately controlled and the crystal growth quality and efficiency are influenced in the prior art; the central control module is connected with the data acquisition module and the growth control module; the data acquisition module is connected with a plurality of types of data sensors, and the growth control module is connected with the crystal growth equipment; the method comprises the steps of acquiring video data of the whole crystal growth process, and constructing or timely updating a crystal growth model based on the video data; comparing the crystal growth model with the constructed standard crystal model, determining control parameters according to the difference between the crystal growth model and the constructed standard crystal model, and controlling crystal growth equipment through a growth control module; the invention realizes monitoring through the crystal growth model, thereby reducing the cost and labor intensity; the adjustment range of the crystal growth equipment is determined by comparing the model with a standard crystal model, and high-precision automatic adjustment is realized.

Description

An Intelligent Control System for Crystal Growth

technical field

The invention belongs to the field of crystal growth, and relates to an intelligent control technology for crystal growth, in particular to an intelligent control system for crystal growth.

Background technique

With the continuous development of crystal growth technology, the operability requirements of technicians for crystal growth continue to increase. There are many crystal growth methods at present, but few of them can achieve automatic control of crystal growth. Most of them require technicians to monitor and operate each link, which is time-consuming and labor-intensive, and operation errors will also affect the quality of crystal growth.

The prior art (invention patent application with publication number CN106400107A) discloses a crystal growth remote control system, which realizes the management, coordination and control of each link of crystal growth by controlling the crystal growth controller connected to each control module of crystal growth, Improve safety and reliability, reduce cost and labor intensity. When controlling crystal growth in the prior art, each functional module can only be adjusted according to the established process and the experience of technicians, and the crystal growth process cannot be precisely controlled, which affects the quality and efficiency of crystal growth; therefore, there is an urgent need for a method for crystal growth. Intelligent control system.

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art; for this reason, the present invention proposes an intelligent control system for crystal growth, which is used to solve the problem that the prior art cannot precisely control the crystal growth process and affect the crystal growth process. Technical issues of growth quality and efficiency.

To achieve the above object, the first aspect of the present invention provides an intelligent control system for crystal growth, including a central control module, and a data acquisition module and a growth control module connected thereto; the data acquisition module is connected to several types of data sensors Connection, the growth control module is connected with the crystal growth equipment;

During crystal growth monitoring, the video data and environmental data of crystal growth are obtained through several types of data sensors, and forwarded to the central control module through the data acquisition module;

The central control module constructs or updates the crystal growth model based on the video data; compares the crystal growth model with the standard crystal model, and sends the comparison result to the growth control module;

The growth control module identifies the received comparison results, sets or adjusts control parameters in combination with the established process, and adjusts the crystal growth equipment based on the control parameters; wherein the control parameters include pH, temperature and carbon dioxide.

Preferably, the central control module communicates and/or electrically connects with the data acquisition module and the growth control module respectively; and the growth control module communicates and/or electrically connects with the crystal growth equipment;

The data acquisition module is respectively in communication and/or electrically connected with the camera and several types of data sensors; wherein, the data sensors include pH sensors, temperature sensors and carbon dioxide sensors.

Preferably, when starting crystal growth monitoring, the central control module determines the data acquisition period according to a predetermined process, generates a data acquisition signal based on the data acquisition period, and sends the data acquisition signal to the data acquisition module;

The data acquisition module collects video data and environmental data according to the data acquisition signal; and forwards the video data and environmental data to the central control module after processing.

Preferably, the central control module determines the data collection period according to a predetermined process, including:

Obtain the established process of crystal growth, and calculate the duration CS of each link in the established process in combination with the properties of the medium; wherein, the established process includes supersaturation, supercooling, nucleation and growth;

The data collection period SCZ is calculated according to the formula SCZ=α×CS/DS; wherein, α is a proportional coefficient greater than 0, DS is a unit duration, and DS is a fixed value.

Preferably, the central control module generates a crystal growth model based on received video data, including:

Perform image preprocessing on video data to obtain several image data; wherein, image preprocessing includes video framing, image correction and gray scale transformation;

The crystal state is identified through several image data, and a three-dimensional model of the crystal is established in combination with a three-dimensional modeling platform, which is marked as a crystal growth model; wherein, the crystal growth model includes a three-dimensional coordinate system.

Preferably, the central control module compares the crystal growth model with the standard crystal model, including:

Determine the current growth link of the crystal growth model in the established process;

Match and compare the corresponding crystal growth content in the growth link with the standard crystal model, analyze and compare the results to determine the difference data, and send the difference data to the growth identification module.

Preferably, the technician establishes a standard crystal model through the central control module, including:

The technician inputs the preset crystal information to the central control module;

The central control module selects the base point through the three-dimensional modeling platform, constructs and renders the standard crystal model in combination with the preset crystal information; wherein, the origin of the three-dimensional coordinate system in the standard crystal model is the base point.

Preferably, the growth identification module determines control parameters according to difference data, including:

Obtain the preset remaining duration of the current growth link;

Combining the remaining time, environmental data, and difference data to determine control parameters; and adjusting the crystal growth equipment based on the control parameters; wherein, the control parameters are consistent with the content attributes of the environmental data.

Compared with the prior art, the beneficial effect of the present invention is: the present invention obtains the video data of the whole process of crystal growth, builds or updates the crystal growth model based on the video data; compares the crystal growth model with the standard crystal model constructed, according to The difference between the two determines the control parameters, and controls the crystal growth equipment through the growth control module; the present invention realizes monitoring through the crystal growth model, which reduces the cost and labor intensity; and determines the adjustment range of the crystal growth equipment by comparing with the standard crystal model , to achieve high-precision automatic adjustment.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic diagram of working steps of the present invention.

detailed description

The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Fig. 1, the embodiment of the first aspect of the present invention provides a kind of intelligent control system for crystal growth, including a central control module, and a data acquisition module and a growth control module connected thereto; the data acquisition module and several types of data sensors The growth control module is connected with the crystal growth equipment; during crystal growth monitoring, the video data and environmental data of crystal growth are obtained through several types of data sensors, and forwarded to the central control module through the data acquisition module; the central control module is based on video Build or update the crystal growth model based on the data; compare the crystal growth model with the standard crystal model, and send the comparison result to the growth control module; the growth control module identifies the received comparison result, sets or adjusts the control parameters in combination with the established process, and based on the control parameters Adjust the crystal growth equipment.

When controlling crystal growth in the prior art, the established process is generally combined with the experience of technicians to adjust each functional module of the crystal growth equipment. There are certain errors and time delays in parameter adjustment based on experience, and it is impossible to control the crystal growth process. Precise control affects the quality and efficiency of crystal growth.

The present invention obtains video data of the whole process of crystal growth, constructs or updates the crystal growth model in time based on the video data; compares the crystal growth model with the constructed standard crystal model, determines the control parameters according to the difference between the two, and controls the crystal growth through the growth control module. The device is controlled. The invention realizes monitoring through the crystal growth model, reduces cost and labor intensity; determines the adjustment range of the crystal growth equipment by comparing with the standard crystal model, and realizes high-precision automatic adjustment.

The central control module of the present invention communicates and/or electrically connects with the data acquisition module and the growth control module respectively; and the growth control module communicates and/or electrically connects with the crystal growth equipment; the data acquisition module communicates with the camera and several types of data sensors respectively and /or electrical connections.

The central control module is mainly responsible for data processing and decision-making, obtains relevant data through the data acquisition module, and sends the decision-making information to the growth control module after analysis. The data acquisition module collects the video of the crystal growth process through the camera (or other video/image acquisition equipment); and the data acquisition module is also connected with various types of data sensors, such as data sensors including pH sensors, temperature sensors and carbon dioxide sensors, etc. Acquisition of environmental data in crystal growth equipment. The growth control module mainly adjusts the environment inside the crystal growth equipment according to the control signal of the central control module, so as to achieve the purpose of guiding crystal growth.

It should be noted that the control parameters are consistent with the content attributes of the environmental data, which include pH, temperature and carbon dioxide in the present invention, and the direction and speed of crystal growth are controlled by adjusting the environment in the crystal growth equipment.

In a preferred embodiment, when crystal growth monitoring starts, the central control module determines the data acquisition period according to a predetermined process, generates a data acquisition signal based on the data acquisition period, and sends the data acquisition signal to the data acquisition module; The signal collects video data and environmental data; and forwards the video data and environmental data to the central control module after processing.

After the central control module determines the data collection period, it generates a data collection signal based on the data collection period. At this moment, the data collection module can perform data collection and transmission. It should be noted that when the data acquisition signal is generated, it does not necessarily mean that the data acquisition module has just started working, but the data acquisition module may continue to collect data, but when receiving the data acquisition signal, the corresponding video data and the environment The data is sent to the central control module.

In an optional embodiment, the central control module determines the data collection period according to the established process, including: obtaining the established process of crystal growth, and calculating the duration CS of each link in the predetermined process in combination with the properties of the medium; according to the formula SCZ=α×CS /DS calculates the data collection period SCZ; where, α is a proportional coefficient greater than 0, DS is a unit duration, and DS is a fixed value.

Before crystal growth, technicians measure the duration of each link according to the established process and other conditions, and determine the data collection period according to the duration. The principle of determining the data acquisition period is that if a certain link lasts for a long time and the crystal growth state changes slowly, the data acquisition period should be appropriately extended; if a certain link lasts for a short time and the crystal growth state changes rapidly, the data acquisition period should be appropriately shortened. When it needs to be explained, the established process in the present invention includes supersaturation, supercooling, nucleation and growth; of course, in some other preferred embodiments, each link can be customized according to the change speed of the crystal growth state.

In a preferred embodiment, the central control module generates a crystal growth model based on the received video data, including: performing image preprocessing on the video data to obtain a number of image data; identifying the crystal state through a number of image data, and establishing a crystal growth model in conjunction with a three-dimensional modeling platform A 3D model of a crystal, labeled Crystal Growth Model.

After the central control module receives the video image, before the crystal growth starts, it needs to build a 3D model, and continuously update the 3D model according to the subsequent video images, that is, update the crystal growth status in real time through the 3D model. A three-dimensional coordinate system is set in the crystal growth model, and the crystal size and extension angle can be accurately calculated in the three-dimensional coordinate system, which is beneficial to analyze the difference from the standard crystal model.

In a preferred embodiment, preferably, the central control module compares the crystal growth model with the standard crystal model, including: determining the current corresponding growth link of the crystal growth model in the established process; growing the corresponding crystal in the growth link Match and compare the content with the standard crystal model, analyze and compare the results to determine the difference data, and send the difference data to the growth identification module.

Compare the crystal growth model with the standard crystal model, match and align the three-dimensional coordinate systems of the two, and then calculate the difference between the two in the three-dimensional coordinate system, that is, obtain the difference data. In the specific calculation, some growth parts are not what the technicians want, so they can be ignored, and the parts that the technicians need should be focused on. The undesired growth part is actually caused by the lack of precise control of the environment in the crystal growth equipment in the early stage. Therefore, after the precise control is realized through the technical solution of the present invention, the undesired part will be significantly reduced.

In an optional embodiment, the technician establishes a standard crystal model through the central control module, including: the technician inputs preset crystal information into the central control module; the central control module selects a base point through a three-dimensional modeling platform, and combines the preset crystal The information is constructed and rendered to obtain a standard crystal model; wherein, the origin of the three-dimensional coordinate system in the standard crystal model is the base point.

The standard crystal model is constructed according to the technician's envisioned data. It also has a built-in three-dimensional coordinate system to facilitate matching and alignment with the crystal growth model. The final crystal growth model will be very close to the standard crystal model.

In a preferred embodiment, the growth identification module determines the control parameters according to the difference data, including: obtaining the preset remaining duration of the current growth link; combining the remaining duration, environmental data and difference data to determine the control parameters; and based on the control The parameters adjust the crystal growth equipment; wherein, the control parameters are consistent with the content attributes of the environment data.

The essence of adjusting the crystal growth equipment according to the control parameters is to adjust the internal pH, temperature, carbon dioxide, etc. When adjusting, it is necessary to consider the diffusion effect of temperature, pH, and carbon dioxide to achieve precise control.

Part of the data in the above formula is calculated by removing the dimension and taking its numerical value. The formula is a formula that is closest to the real situation through software simulation of a large amount of collected data; the preset parameters and preset thresholds in the formula are determined by those skilled in the art. It is set according to the actual situation or obtained through a large amount of data simulation.

Working principle of the present invention:

During crystal growth monitoring, video data and environmental data of crystal growth are acquired through several types of data sensors, and forwarded to the central control module through the data acquisition module.

The central control module constructs or updates the crystal growth model based on the video data; compares the crystal growth model with the standard crystal model, and sends the comparison result to the growth control module.

The growth control module identifies the received comparison result, sets or adjusts control parameters in combination with the established process, and adjusts the crystal growth equipment based on the control parameters.

The above embodiments are only used to illustrate the technical method of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical method of the present invention can be modified or equivalently replaced. Without departing from the spirit and scope of the technical method of the present invention.

Claims (8)

1. An intelligent control system for crystal growth comprises a central control module, a data acquisition module and a growth control module, wherein the data acquisition module and the growth control module are connected with the central control module; the data acquisition module is connected with a plurality of types of data sensors, and the growth control module is connected with crystal growth equipment, its characterized in that:

when the crystal growth is monitored, video data and environmental data of the crystal growth are acquired through a plurality of types of data sensors and are forwarded to a central control module through a data acquisition module;

the central control module builds or updates a crystal growth model based on the video data; comparing the crystal growth model with a standard crystal model, and sending a comparison result to a growth control module;

the growth control module identifies the received comparison result, combines the set flow setting or adjusts the control parameters, and adjusts the crystal growth equipment based on the control parameters; wherein the control parameters include pH, temperature, and carbon dioxide.

2. An intelligent control system for crystal growth as claimed in claim 1, wherein the central control module is in communication and/or electrical connection with the data acquisition module and the growth control module, respectively; and the growth control module is in communication and/or electrical connection with the crystal growing apparatus;

the data acquisition module is respectively in communication and/or electrical connection with the camera and the data sensors of a plurality of types; wherein the data sensor comprises a pH sensor, a temperature sensor and a carbon dioxide sensor.

3. The intelligent control system for crystal growth according to claim 2, wherein when crystal growth monitoring is started, the central control module determines a data acquisition period according to a predetermined flow, generates a data acquisition signal based on the data acquisition period, and sends the data acquisition signal to the data acquisition module;

the data acquisition module acquires video data and environmental data according to the data acquisition signal; and processing the video data and the environmental data and then forwarding the processed video data and the environmental data to the central control module.

4. An intelligent control system for crystal growth as claimed in claim 3, wherein the central control module determines the data collection period according to a predetermined process, comprising:

obtaining a set flow of crystal growth, and measuring and calculating the duration CS of each link in the set flow by combining medium attributes; wherein the established process comprises a supersaturation link, a supercooling link, a nucleation link and a growth link;

calculating a data acquisition period SCZ according to a formula SCZ = alpha multiplied by CS/DS; wherein alpha is a proportionality coefficient greater than 0, DS is a unit duration, and DS is a fixed value.

5. The intelligent control system for crystal growth of any one of claims 1 to 4, wherein the hub control module generates a crystal growth model based on the received video data, comprising:

carrying out image preprocessing on the video data to obtain a plurality of image data; the image preprocessing comprises video framing, image correction and gray level conversion;

identifying the state of the crystal through a plurality of image data, establishing a three-dimensional model of the crystal by combining a three-dimensional modeling platform, and marking the model as a crystal growth model; wherein the crystal growth model includes a three-dimensional coordinate system.

6. An intelligent control system for crystal growth as defined in claim 5, wherein the hub control module compares the crystal growth model to a standard crystal model, comprising:

determining a growth link corresponding to the crystal growth model in the established flow at present;

and matching and comparing the corresponding crystal growth content in the growth link with the standard crystal model, analyzing the comparison result to determine difference data, and sending the difference data to the growth identification module.

7. An intelligent control system for crystal growth as claimed in claim 6, wherein a technician establishes a standard crystal model through the central control module, comprising:

the technical personnel input the preset crystal information into the central control module;

the central control module selects a base point through a three-dimensional modeling platform, and combines preset crystal information to construct and render to obtain a standard crystal model; wherein, the origin of the three-dimensional coordinate system in the standard crystal model is a base point.

8. An intelligent control system for crystal growth as defined in claim 7, wherein the growth identification module determines control parameters based on the difference data, comprising:

acquiring preset residual time of a current growth link;

combining the residual duration, the environmental data and the difference data to determine a control parameter; and adjusting the crystal growth apparatus based on the control parameters; wherein the control parameter is consistent with the environment data content attribute.

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